Load data for .450 N.E. 3 1/4'' + .458 | 250gr | Hornady Monoflex

Recommended Powder(s): Alliant AR-Comp, Alliant Reloder-10x

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.458 \| 250gr \| Hornady Monoflex
Manufacturer SKU:	45010
Bullet Weight:	250gr \| 16.2g
Bullet Diameter:	0.458" \| 11.63mm
Bullet Length:	1.020" \| 25.9mm
Caliber:	.450 N.E. 3 1/4'' load data
Case Length (l3):	3.250" \| 82.5mm
Cartridge Length (C.O.L.):	3.891" \| 98.8mm
Seated Depth:	0.379" \| 9.6mm
Shank Seated Depth:	0.379" \| 9.6mm
Case Capacity:	136.0 Grains of Water \| 8.83 cm³
Primer Size:	Large Rifle Magnum (LRM)
Max. allowed Pressure:	44237 psi \| 3050 bar
LID:	LID_B2876_C765
Last updated:	2025-02-02

Load data for 84 loads in caliber .450 N.E. 3 1/4'' with .458 | 250gr | Hornady Monoflex bullet and 42 powders such as Alliant AR-Comp, Alliant Reloder-10x. The key underlying parameters are shown in the table above.

Important Notice: DO NOT go below Minimum Charge or above Maximum Charge unless there are reasons. Since xxlreloading.com has no control over the equipment and components used by the customer and the data used in connection with the website, any responsibility and liability for the results achieved is rejected. Also see our Terms of Service.

Questions regarding the load data: Please read the information in the next tab "Explanations".
A load must fulfill certain criteria to be listed in the default view below - see "powder criteria to fulfill to be listed".

Our load data might deviate from other sources - see the "most common reasons for deviations".

All loads are based on the bullet and case dimensions shown under "Load Specifications" - see "reloading suggestions" if you deviate.

You can set your specifications in the "Personalized Load Calculator".

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Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
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Use the Personalized Load Calculator to customize loads to your own specific requirements. Find more details in the help section.

Our default view only displays powders/loads that fulfill certain criteria: Max pressure of a load <=90% of Max. Standardized Pressure. Fill Rate (Min FR): >80% and <100% for rife loads, >60% and <100% for pistol loads. Min. Propellant Combustion (Min z): >90% for rifle loads , >80% for pistol/revolver loads. Relax these criteria at your own risk to potentially get more powders shown in the load tables.

Click on the desired row in the tables below to add a specific load / powder to your Diary and manage there.

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2219	<<locked>>	83%	39334	89%	**17	96%
Accurate 2015	<<locked>>	88%	39407	89%	**74	98%
[Accurate 2460]*	<<locked>>	87%	39668	90%	**81	93%
Accurate 2495	<<locked>>	94%	39581	89%	**69	98%
[Accurate 2520]*	<<locked>>	92%	39436	89%	**33	94%
Accurate 4064	<<locked>>	97%	36027	81%	**81	95%
Alliant AR-Comp 👍	<<locked>>	92%	39726	90%	**72	100%
Alliant Reloder-10x 👍	<<locked>>	85%	39421	89%	**97	99%
[Hodgdon BL-C2]*	<<locked>>	92%	39798	90%	**43	92%
[Hodgdon Benchmark]*	<<locked>>	88%	39537	89%	**28	93%
Hodgdon H322	<<locked>>	89%	39334	89%	**17	96%
Hodgdon H335	<<locked>>	84%	39697	90%	**10	95%
Hodgdon TrailBoss	<<locked>>	97%	30966	70%	**93	100%
IMR 3031	<<locked>>	97%	39378	89%	**79	97%
IMR 4198	<<locked>>	84%	39479	89%	**61	100%
[IMR 8208 XBR]*	<<locked>>	90%	39697	90%	**74	92%
[Lovex D073.4]*	<<locked>>	85%	39421	89%	**61	93%
[Lovex D073.5]*	<<locked>>	87%	39668	90%	**81	93%
[Lovex D073.6]*	<<locked>>	94%	39436	89%	**33	94%
[Lovex S062]*	<<locked>>	97%	39363	89%	**97	92%
[Norma 201]*	<<locked>>	93%	39624	90%	**81	92%
Norma 202	<<locked>>	93%	39537	89%	**17	95%
ReloadSwiss RS 14	<<locked>>	96%	30821	70%	**36	100%
[ReloadSwiss RS 40]*	<<locked>>	86%	39740	90%	**87	94%
[ReloadSwiss RS 52]*	<<locked>>	97%	38435	87%	**27	92%
Rottweil R 901	<<locked>>	90%	39668	90%	**74	95%
[Rottweil R 902]*	<<locked>>	95%	39595	90%	**74	92%
SNPE Vectan SP 10	<<locked>>	83%	39769	90%	**17	95%
SNPE Vectan Tubal 3000	<<locked>>	91%	39537	89%	**22	95%
SNPE Vectan Tubal 5000	<<locked>>	97%	38421	87%	**05	96%
[Shooters World Match Rifle]*	<<locked>>	94%	39436	89%	**33	94%
[Shooters World Precision]*	<<locked>>	97%	39363	89%	**97	92%
[Shooters World Tactical Rifle]*	<<locked>>	84%	39653	90%	**35	91%
[Somchem S321]*	<<locked>>	88%	39798	90%	**04	92%
Somchem S335	<<locked>>	92%	39624	90%	**48	96%
Vihtavuori N130	<<locked>>	87%	39566	89%	**35	99%
Vihtavuori N133	<<locked>>	94%	39711	90%	**48	98%
Vihtavuori N135	<<locked>>	97%	33054	75%	**66	96%
Vihtavuori N140	<<locked>>	95%	39523	89%	**87	96%
[Vihtavuori N530]*	<<locked>>	89%	39668	90%	**00	92%
Vihtavuori N540	<<locked>>	96%	39813	90%	**13	95%
[Winchester 748]*	<<locked>>	89%	39798	90%	**40	93%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2219	<<locked>>	81%	36564	83%	**41	95%
Accurate 2015	<<locked>>	81%	31314	71%	**80	96%
[Accurate 2460]*	<<locked>>	81%	32068	73%	**97	90%
[Accurate 2495]*	<<locked>>	81%	25135	57%	**79	93%
[Accurate 2520]*	<<locked>>	85%	30095	68%	**97	90%
[Accurate 4064]*	<<locked>>	88%	26818	61%	**15	90%
Alliant AR-Comp	<<locked>>	81%	27615	62%	**41	97%
Alliant Reloder-10x	<<locked>>	81%	34505	78%	**76	98%
[Hodgdon BL-C2]*	<<locked>>	89%	35897	81%	**48	90%
[Hodgdon Benchmark]*	<<locked>>	82%	33721	76%	**87	90%
[Hodgdon H322]*	<<locked>>	81%	31038	70%	**94	93%
[Hodgdon H335]*	<<locked>>	81%	35984	81%	**22	94%
Hodgdon TrailBoss	<<locked>>	81%	24323	55%	**32	100%
[IMR 3031]*	<<locked>>	82%	25208	57%	**52	90%
IMR 4198	<<locked>>	81%	36492	82%	**85	99%
[IMR 8208 XBR]*	<<locked>>	87%	35331	80%	**72	90%
[Lovex D073.4]*	<<locked>>	81%	33794	76%	**23	91%
[Lovex D073.5]*	<<locked>>	81%	32068	73%	**97	90%
[Lovex D073.6]*	<<locked>>	87%	30095	68%	**97	90%
[Lovex S062]*	<<locked>>	93%	34882	79%	**79	90%
[Norma 201]*	<<locked>>	89%	34853	79%	**69	90%
[Norma 202]*	<<locked>>	83%	28268	64%	**05	90%
ReloadSwiss RS 14	<<locked>>	81%	24192	55%	**72	100%
[ReloadSwiss RS 40]*	<<locked>>	81%	33330	75%	**26	91%
[ReloadSwiss RS 52]*	<<locked>>	94%	34983	79%	**41	90%
[Rottweil R 901]*	<<locked>>	81%	30255	68%	**35	91%
[Rottweil R 902]*	<<locked>>	91%	35230	80%	**62	90%
[SNPE Vectan SP 10]*	<<locked>>	81%	37057	84%	**41	94%
[SNPE Vectan Tubal 3000]*	<<locked>>	81%	29298	66%	**52	91%
[SNPE Vectan Tubal 5000]*	<<locked>>	84%	26165	59%	**67	90%
[Shooters World Match Rifle]*	<<locked>>	87%	30095	68%	**97	90%
[Shooters World Precision]*	<<locked>>	93%	34882	79%	**79	90%
[Shooters World Tactical Rifle]*	<<locked>>	82%	36521	83%	**62	90%
[Somchem S321]*	<<locked>>	84%	34258	77%	**69	90%
[Somchem S335]*	<<locked>>	81%	28398	64%	**52	92%
Vihtavuori N130	<<locked>>	81%	32735	74%	**74	97%
[Vihtavuori N133]*	<<locked>>	81%	26876	61%	**10	93%
[Vihtavuori N135]*	<<locked>>	86%	23641	53%	**67	90%
[Vihtavuori N140]*	<<locked>>	84%	27601	62%	**62	90%
[Vihtavuori N530]*	<<locked>>	85%	34983	79%	**79	90%
[Vihtavuori N540]*	<<locked>>	85%	28732	65%	**21	90%
[Winchester 748]*	<<locked>>	84%	33736	76%	**82	90%

Start Load - Barrel Length: 23.60''

Any powder missing? Then click here.

FR ... fill rate of the cartridge in percent

MaxP ... max. pressure of load in psi or bar

% ... max. pressure of load in percent of the maximum allowed pressure for this caliber

V(0) ... muzzle velocity in feet per second (fps) or meters per second (m/s)

z ... powder burnt in percent

[...] *... not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.

[...] ²... fill rate low - you might want to consider using a filler to ensure proper ignition.

[...] ᴾ... possible press load - work up slowly to this load while watching for signs of excessive pressure.

👍 ... recommended powder/load for this caliber and bullet combination based on its ballistic performance.